[clang] [clang] Fix null dereference on return in lambda attribute statement expr (PR #66643)

[Mariya Podchishchaeva via cfe-commits]

https://github.com/Fznamznon commented:

The change needs a release note, otherwise looks good.
Right, @cor3ntin  ?

https://github.com/llvm/llvm-project/pull/66643